It's great to focus on your fitness, but at the end of the day the racquet matters. It takes me 5-10 minutes to setup a racquet depending on what I want to do (sometimes A LOT longer). Not much time or effort considering it takes me 3 times that to string a racquet (or more). Let alone the countless hours we all spend learning/practicing.
5-10 minutes of simple straight forward cutting and taping of a racquet can get you performance increases that no amount of training can give you; changing the way the racquet behaves.
I just think that old narrative has been too over used and unfairly used. If anything, it's foolish to spend hundreds of hours, possibly thousands on coaching/training, only to use a racquet that is fundamentally holding you back. Especially when the cost in terms of time, and material to make a racquet perform much better is basically minuscule. If you calculate the value of the lead you typically put on a racquet, it's really probably one of the cheapest things you'll ever buy. Less than a can of balls, or even pack of overgrips. Even in extreme cases, you're never going to use even 30$ worth of tape on one racquet.
So I think that kind of thinking is well... a step backwards. I never want to tell people to not worry about technique, the opposite really. But we need to stop acting like caring what you're using is stupid.
If this was a topic about "Should I buy this new racquet that everyone likes?" or "which one of these new racquets should I buy?" then I could see the attitude against it. Because at least on some level you're not getting what you believe you are, and usually not getting your money's worth.
Just my two cents. Your post wasn't as cringey as some of the responses I've seen on here, but I just want to say I disagree. And there are plenty of facts to prove it. Especially when someone like shroud is asking for input... Using a 400sw isn't anything to just casually say "training is important", that's a lot of racquet. Making a switch to even 350 is going to be a big change. A bigger one than 99% of the players on here will ever even consider.